Similar legislation is making its way through Parliament in the UK. Despite the outcome in France, Anglican Mainstream said it was not inevitable that it would be passed here. It is encouraging Christians to write to MPs about their concerns.

In a statement it said: "Many Christians will regret the outcome of the vote for 'same-sex marriage' in the French Parliament, which highlights concerns about news management in the mainstream media in Western societies.

"It should not be assumed that the vote in the UK Parliament will go the same way. The key issue is how marriage as traditionally understood – a lifelong, exclusive commitment between a man and woman – contributes so significantly to the flourishing of human society.

"Although this matter is of particular significance to Christians (and people of other faiths), its ramifications extend into society as a whole: for example, its implications for what teachers will be required to teach children about same sex practice."